Summary of Expenditures 23 



The cost of maintenance is rising despite the strictest econ- 

 omy in office administration, in the custodianship of the build- 

 ing, in heating and lighting, in repairs and construction, which 

 constitute the bulk of our maintenance expenditures. Our 

 Chief Engineer, Mr. Henry J. Langham, has an exceptional 

 record in the heating and lighting department; in 1919 the 

 coal bill for light, heat and power was $11,990.61, including 

 the generation of some four hundred thousand kilowatt illu- 

 mination and power. In the year 191 5 a careful classification 

 of disbursements was instituted in order to keep track of ex- 

 penditures of every kind. A comparison of the grand totals 

 for the years 1919 and 1920 shows that the increase is due 

 to the rapid mounting in wages and salaries and to the cost of 

 materials. The summary of the detailed division of expendi- 

 tures is as follows : 



1. Scientific Expenditures: 1919 1920 



1. Additions to collections through pur- 

 chase and field exploration ; salaries $ 44,092.76 $ 65,058.76 



2. Scientific staff; salaries of experts and 



assistants 151,110.56 176,427.81 



3. Library : purchase of books ; bookbind- 

 ing; salaries of librarian and assistants. 17,695.91 21,432.91 



4. Preparation of exhibitions; mounting; 

 materials used in mounting specimens 



and exhibits 98,628.95 106,709.83 



5. Publication of scientific bulletins, me- 

 moirs, monographs, and miscellaneous 



technical papers 11,342.99 19,660.57 



6. Publication of Natural History, popular 



guide books and leaflets 21,942.92 34,448.68 



7. American Museum Press : salaries ; ma- 

 terials and supplies; printing of scien- 

 tific, popular and miscellaneous work. . . 6,051.14 15,951-73 



8. School educational work; special ex- 

 penses ; salaries 7,742.95 13,764.46 



9. Office supplies; office and scientific 



equipment 448-34 997-86 



$359,056.52 $454,452.6i 



2. Financial and General Administration : 



10. Salaries of administrative staff $ 74,031.61 $90,713.65 



11. Salaries of custodians and attendants.. 69,583.38 105,129.33 



12. Office Supplies 5,824.35 9,689.36 



13. General plant supplies : 3,414.77 4,466.57 



14. General administrative supplies and 

 service; mechanical and office equip- 

 ment 39,414-97 48,647-94 



Carried forward $192,269.08 $258,646.85 



